const pm = async () => {
  return new Promise(resolve => {
    setTimeout(() => {
      console.log('定时器器执行')
      resolve()
    }, 1000)
  })
}

export default async () => {
  await pm()
  console.log(`定时器···完成`)
}


const s0 = new Promise(()=>({}))
const s1 = new Promise(()=>({}))
const s2 = new Promise(()=>({}))
const s3 = new Promise(()=>({}))
